Peugeot 406 Lambda Sensor Problems

Problems mentioning the Lambda Sensor on the Peugeot 406
Revs up and down

struggles to start when cold,then ok untill is hot, ive cleaned all the throttel body, stripped it rite down cleaned stepper motor,and all other parts,revs dropped slightly but still goes up n down ,first time it started after clean it reve...

1999 18 16 valve
Posted: Jul 8, 2010
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Major flooding

had a problem with a rattling cat, which i replaced, all seemed fine, swithched it off after running for 10mins. when i came back to car it wouldn't start, it had flooded big time! thought it could be a lambda sensor fault, so replaced it b...

1998 2.0 16v petrol
Posted: Aug 17, 2011
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What problems can be caused by a faulty Lambda Sensor?